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TCP/IP protocol family
1.1 Introduction
The TCP/IP protocol family consists of 5 layers: Physical layer, Data link layer, network layer, Transport layer and application layer. The first four layers correspond to the first four layers of the OSI mod

ch = "123456780123";
int n = 2,m = 10;
*.*, the front is defined as the total width, and the number of outputs is defined in the rear.
If the rear is smaller than the front, use a space to make up M-bit on the left.
printf ("%*.*s/n", m,n,ch);//Here

After the server became 64, 64-bit background GP has also come out, and desktop, engine still 32, in use because of this 32-bit and 64-bit problems caused by the attendant. Some of these problems in the product to help provide a corresponding solutio

The size of the computer stores information, the most basic unit is byte, a Chinese character consists of two bytes, letters and numbers are composed of a byte.
Units of capacity are from small to large: bytes (B), KB, MB, GB, TB. The relationship

The difference between cookie mechanism and session mechanism*************************************************************************************Specifically, the cookie mechanism is a scheme for maintaining state on the client side, and the session

The difference between cookie mechanism and session mechanism*************************************************************************************Specifically, the cookie mechanism is a scheme for maintaining state on the client side, and the session

1. Introduction
MD5 algorithm is often used to verify the integrity of network file transmission, to prevent files from being tampered with. MD5 full name is the digest to the algorithm (Message-digest algorithm 5), this algorithm for arbitrary leng

14.3. File compression and archiving
Sometimes we need to store a set of files in a single file for backup or transfer to another directory or even another computer. Sometimes we also need to compress files into one file, so they use only a small am

Noun Explanation: This dynamic runtime dynamic, so that the EF dynamic support new tables, dynamic switching database is intended to not change the core framework of the project,
The header is achieved by adding or replacing components.
First, a lit

An explanation of the error number (that is, Err.Number)
Number:1Description: An application-defined error or an object-defined error.Number:2Description: An application-defined error or an object-defined error.Number:3Description: This error number

QEMU virtual machines can play Raspberry Pi, as we all know. But the online tutorial is very old, all 2012. I downloaded the latest version of the Raspberry Pi system according to the tutorial how can not run up.
Study for a long time, finally found

Summary:工欲善其事, its prerequisite. When developers develop a project, they must choose a suitable database, and the database management tool can help developers easily solve many problems.
Any web software and applications need a strong database to sup

Problem Description:
Now the site in the registration step, because the background to deal with a lot of information, resulting in slow response (test machine poor performance is also a factor to slow down), before the front page to submit informatio

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